Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Information About IP Unnumbered Ethernet Polling Support

IP Unnumbered Ethernet Polling Support Overview

IP unnumbered support for serial interfaces is extended to Ethernet physical interfaces. Unnumbered Ethernet physical interfaces are used in the same manner as unnumbered serial interfaces. On a device, if a loopback interface is configured and an IP address is assigned to it, using the polling option more than one Ethernet physical interface can be unnumbered to the loopback.

The polling option enables the dynamic discovery of hosts (connected though the unnumbered interfaces) based on the Address Resolution Protocol (ARP) protocol.

Configuring the Queue Size and the Packet Rate for IP ARP Polling for Unnumbered Interfaces

SUMMARY STEPS

1.enable

2.configureterminal

3.iparppollqueuequeue-size

4.iparppollratepacket-rate

5.end

DETAILED STEPS

Command or Action

Purpose

Step 1

enable

Example:

Device> enable

Enables privileged EXEC mode.

Enter your password if prompted.

Step 2

configureterminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 3

iparppollqueuequeue-size

Example:

Device(config)# ip arp poll queue 1000

Configures the IP ARP polling queue size.

Step 4

iparppollratepacket-rate

Example:

Device(config)# ip arp poll rate 1000

Configures the IP ARP polling packet rate, in packets per second.

Step 5

end

Example:

Device(config-if)# end

Returns to privileged EXEC mode.

Verifying IP Unnumbered Ethernet Polling Support

Perform this task to verify IP unnumbered Ethernet polling support.

Note

The
show commands are not in any specific order.

SUMMARY STEPS

1.enable

2.showiparppoll

3.showipinterfacetypenumberunnumbered

4.showipinterfacetypenumberunnumbereddetail

DETAILED STEPS

Step 1

enable

Enables privileged EXEC mode.

Example:

Device> enable

Step 2

showiparppoll

Displays the IP ARP host polling status.

Example:

Device# show ip arp poll
Number of IP addresses processed for polling: 438
Number of entries in the queue: 100 (high water mark: 154, max: 1000)
Number of request dropped:
Queue was full: 1288
Request was throttled by incomplete ARP: 10
Duplicate entry found in queue: 1431

Step 3

showipinterfacetypenumberunnumbered

Displays the status of unnumbered interface support on interfaces configured for IP.

Example:

Device# show ip interface loopback 0 unnumbered
Number of unnumbered interfaces with polling: 10
Number of IP addresses processed for polling: 15
Number of IP addresses in queue for polling: 4

Step 4

showipinterfacetypenumberunnumbereddetail

Displays the detailed status of unnumbered interface support on interfaces configured for IP.

Technical Assistance

Description

Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

Feature Information for IP Unnumbered Ethernet Polling Support

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.